Order now the 1794-OB32P, the ultra-high-density 32-point digital sourcing output module from the Allen-Bradley FLEX I/O series. This module provides double the point count in the same compact footprint as standard 16-point modules, making it the perfect solution for modern control cabinets where DIN rail space is at a premium and high-density protection is required.
What Is the 1794-OB32P?
The 1794-OB32P is a high-density 24V DC digital output module that offers 32 sourcing outputs. Like its 16-point counterpart, it features internal electronic protection against short circuits and overcurrent. It is specifically designed to handle a large number of discrete loads, such as solenoids, relays, and indicators, while maintaining the diagnostic and protective features necessary for high-availability systems. It requires a 32-point terminal base, such as the 1794-TB32 or 1794-TB32S, to accommodate the increased wiring density.
Key Technical Specifications
- Number of Outputs: 32 (Sourcing, Protected)
- Voltage Range: 10.2V DC to 31.2V DC
- Output Current Rating: 500mA per channel (max 14A per module at 55°C)
- Protection: Electronic per-channel shutdown
- On-State Voltage Drop: 0.5V DC maximum
- FLEXBus Current: 80mA
- Module Location: Terminal Base 1794-TB32, 1794-TB32S
Architecture and High-Density Implementation
The 1794-OB32P is engineered for large-scale distributed I/O systems. By consolidating 32 points into a single module, it reduces the number of communication adapters and terminal bases required in a system. This architecture not only lowers the hardware cost but also simplifies the EtherNet/IP or ControlNet network configuration by reducing the number of nodes the master controller must manage.
Installation Advice
Due to the high density of the 1794-OB32P, wiring management is critical. Use the 1794-TB32S spring-clamp terminal base to reduce wiring time and ensure vibration-resistant connections. Ensure that the total current draw for the entire module does not exceed 14A, especially when all 32 outputs are active simultaneously, as exceeding this limit can lead to thermal shutdown or reduced module lifespan.
Frequently Asked Questions
Q: Does the 1794-OB32P support per-channel diagnostics in the PLC?
A: It provides a «Module Status» bit to indicate a general fault, but unlike specialized diagnostic modules, the protection is primarily for hardware safety. Fault monitoring is typically handled through a collective status bit.
Q: Is field-side power required for this module to function?
A: Yes, 24V DC field power must be supplied to the terminal base to power the sourcing outputs and the internal protection logic.
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